The best places we have tried in Tagaytay na binabalik-balikan namin are the ff:
Antonio's - high-end but worth every centavo you spend. The food, ambiance and service are great. Hands down the perfect place to celebrate anything special sa restaurant na ito. Or if you just want to splurge go here. Reservations only.
Restaurant Verbena in Discovery Country Suites - super yummy food! It's a Miele's guide reco. Service is great. Right now they have 50% off every Wednesdays until July in celebration of their 8th year anniversary. You can do walk-in but go early since they are always full specially on weekends.
Sonya's garden - simple, organic and yummy food. We've tried both their B&B accommodation and walk-in dining. Andami ng servings nila! Very affordable. I love their dalandan juice.
Marcia Adams Tuscany - new discovery, recommended by sis mkga. Ang ganda ng place nya! Their food is simple lang but very tasty. Affordable din, average price for a 3 course meal is Php700 (appetizer/main entree/dessert). The owners are very engaging and hands on. Reservations only.